Hypodermic syringe and cartridge therefor.



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J yA. HOESCH. HYPODERMIO SYRINGE AND CARTRIDGE THEREFOR.

Ammon-Ibn rIL'nn MAB. a, 1910.

lPatented Dec. 13, 1910.

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1.* WTNESSES: l Wpwm 9% QM/WM l l .45 -watch the usual A UNTTED STATES PATENT onirica.

.ALFRED HOESCH, F NEW YORK, N. Y., ASSIGNOR TO CHARLES J. TAGLIABUE MANU FACTUBING CO., OF NEW YOBILN. Y.,

A CORPORATION OF NEW YORK.

HYPODEBMIC SYRINGEv AND CARTRIDGE THEREFOR.

, ratentednea1a191o.

Application led March 2, 1910. Serial No. 546,799.

To all whom 'it may concern:

y Be it known that I, ALFRED ARonscil, a citizen of the United States, and resident of the borough of Brooklyn, county of Kings, city 5 and State of New York, have invented a certain new and useful Improvement in Hypodermic Syringes and Cartridges Therefor, of which the following is a s eciication.

My invention relates to hypo ermic syringes and has for its .object to construct such syringes 'in a manner to permit the use of a cartri ge or capsule in connection therewith, which'capsules or cartridges each con-l tain a predetermined amount of solution or matter to be injected and which are provided w1th a closing cap capable of being' forced .axially of said cartridges in the capacity of a plunger, to eject the contents thereof. ,Heretofore it has been necessary in each particular and separate mstance` for the physician tocarefully prepare the solution or other material to be injected. As in most cases onlydai small quantity of injection material is needed at one time and as it is often '25 dicult to properly prepare such material in these small quantities, it is necessary to pre are a larger supply than yis required so t at ofttimes on account of -the nature of the matter used in the syrin e the surplus thereof s oils before it can e again used y l thus res ting in a great waste of material. Furthermore if it becomes necessary for the physiclan to prepare an injection in a hurry a mistake in ingredients is likely to be madef 35 ofttimes endangerlng the life4 o the patient.

-The particular object of my'invention is to overcome these objections -a'nd ,to provide a receptacle for a fixed amount of'materal which may be carefully ypreparedunder most ,40' favorable circumstances so that a mistake in -the com ounding thereof 'is not likel to occur. lso, by having each receptac e or cartridge contain such fixed amount, to make it` unnecessary for the physician to carefully aduations and to carefully manipulate t e syringe in order to inject the proper amount of material.,

i Another lobject of my"improvement is to keep the usual piston or themside surface of the syringe barrel from cominginto contact with the matter to be injected so that if these parts should happen to be in y an infected condition and not perfectly clean there is nol danger .of the infection and unclean matter 55. being tra 'tted to the patient.

ypiston rod `7 carries an op cap 4 is further provided centrally cone shaped and formed with an inwardly 15. exten My invention will be full described yhereinafter and the features o novelty will be pointed out. in the ap ended claims.

Reference is to be ad to the accompanying drawin in whichl Figure 1 1s a central longitudinal sectional view of a syringe with my improvement applied thereto; ig. 2 is a similar view of .a portion 'of another form of syringe; Fig. 3 1s an enlarged detail section of the cartridgeN 65 or capsule used in connection with my improved syringe and Fig. 4 is a horizontal section thereof on the line 4-4 of Fig. 3.

In the drawings 1 represents the usual barrel of the syringe which may be made of any vsuitable material as for instance glass and which is provided with oppositely screw-threaded ends 2 ada ted to receive the caps 3 and 4. The cap 3 1s provided with opposltely extending ingerdpieces 5.for mampulating the syringe an further has a central aperture 6 for the accommodation of the customary 1piston rod 7. The said eratin head 8 at one end andat its opposite end 1s provided with a piston or plunger 9 which may be 1ntegral therewith or a separate element secured thereto as desired and which has a recess 10 formed in its lower face. It will be noticed that the diameter offthe piston 'or plunger-9 is somewhat smaller than the interior diameter of the syringe barrel so i that an annular space is formed. between the interior surface of said syrin e barrel and the exterior periphery of sai plungerthe purpose of which will be more fully d1s closed hereinafter.

The 'cap 4 is provided with an externall1 screw-threaded neck 11 arranged to receive the usual hypodermic needle 12. Theisild O B horizontal surface which is adjacent to the discharge end of the barrel 1 with an inwardly extending projection 13 preferably projecting point 14. A channel or passage s centrally through said cap from the extreme inner or ee end `of 4the point 14' to the free end of the-neck 11 and serves to establish communication between 4the in- 105 terior of the syringe barrel 1 and the hypodermic needle 12.

A cartrid e or capsule 16 formed to correspond to t e interior sha eof the syringe erein is adapted 110 barrel and to slidably lit cartridge is of a capacity -jto contain a predetermined amount of material suitable for special and all purposes and is preferably' f marked to indicate the nature of its contents cause the closure 17 to which the syringe as Well as the quantity thereof. The open end of said cartridge 16 is hermetically closed by means of a cup shaped or dished closure 17 which is, preferably held in position in said cartridge'inerely by friction and is"provided with a recess 18. The combined thickness of the Vertical walls of the cartridge and the corresponding wallsof the closure is such as to readily extend into the annular space between the barrel and the piston, which piston is of a diameter to easily slide into the cup shaped closure and to snugly fit the same.'

In operation when it is desired to use the syringe the lcap-3 is unscrewed and the piston 9 and piston rod 7 removed from thebarrel. A cartridge 16 containing the matter to be injected in proper proportions and of the required amount necessary .for the particular case in hand is then slipped into said syringe barrel. After this has been ldone the ocap 3 is again secured in position on the barrel and the piston rod and piston pushed inwardly so as to force the said cartridge toward the discharge end of the syringe. lAs the said cartridge is thus forced home the bottom thereof will finally engage the point 14 which as the pressure on the piston continues will be forced through said bottom so as to puncture it and thus establish com- 'munication-between the interior of the Vcartridge and -th hypodermic needle, after is ready for use. A further inward pressure ofthe piston will now the cartridge 16 so vas to .expel the contents thereof through the passage 15 and then through, the needle 12 until finally the said closure reaches the bottom of the cartridge in which position the point 14 extends into the recess 18 and does not puncture the bottom of said closure.

piston 9 is provided for the purpose of accommodating the inwardlyextending portion of the bottom `of the closure which forms the walls of the recess 18.

With my improvement a'predetermined amount of injecting material is supplied -which has been carefully and sanitarily prepared and which isv protected against contam1nat1o n before use. Owing to the fact that this injecting materiall'does not contact slide lengthwise of The recess 10 of themasa' with the syringe cylinder it is not essential l contents as clearly shown inFig. 1. This closure 17 thus acts in the nature of a protector as Well as a plunger to expel the injecting matter and does away with leaky and otherwise troublesome pistons owing to the fact that said closure may readily be made to t the said cartridge as snugly as desired. By providing this previously prepared and measured injection the danger of a mistake in mixing being made by a physician in a`hurry is done away with andthe necessity for the usual graduations on either the piston rod or'the syringe barrel is also obviated A careful manipulation Vof the syringe is thus unnecessary to' guard against an overdose of inject-ing mattei' as all that is necessary in using the syringe is to insert a cartridge with the required amount of matter'therein and then forcethe piston home soas to expel the entire previously measured contents of said cartridge. As any number I and variety of these loaded cartridges may be carried about or in stock a great deal of' -time in mixing is saved. Furthermore as 'the' said cartridges are easily and cheaply made it is unnecessary to use the same more than once so 'that after one cartridge has been' emptied and used it is simply removed from the syringe and discarded. The patient is therefore securely guarded against infection from unclean syringes or from solutions which may have become infected aftermixingby beingvkept in an exposed condition and location and with only ordinary precaution to use the correct cartridge is also exempt from the danger of overdose of injecting material.

Instead of making the syringe of a shape to accommodate cylindrical; i and angular cartridges the same may be made as shown iny Fig. 2 forjuserin connection with capsules or cartridges of spherical er oval conformation. In the illustration a gelatin capp sulev19 is shown in position in the barrel and .the piston 9a is formed with a vrounded or convex surface 9b. As this piston is moved inwardly it will force the capsule toward .the point 14a which will puncture said capsule in thel same manner 'as hereinbefore described. A continued operation of the pis? tonwill compress said capsule without however breaking thewallsthereof and force the contents through the hypodermic needle. In this instance the material of which the capsule is made serves to against contact either with the piston 9a.

with the/barrel 1 or .manner as is the syringe shown in Fig. 1.

Other/.Wise this form of my invention may be `constructed in the samel protect the contents departing rVarious modifications and changes in the specific forms shown and described may be made within the scope of the claims without from the nature of my invention. Claims:

1. A syringe comprising a barrel havingy a discharge end, a receptacle for contains.-

` ing communication between said receptacle and saidl discharge end, a cap or closure for closing one end of said rece tacle and a plunger movable in said barre and adapted to engage said cap and move it lengthwise of said receptacle to discharge the contents thereof.

3. A syringe comprising .a barrel having a discharge end, a receptacle for containing a predetermined amount of fluid removably secured in said barrel and communicating with said discharge' end, a cup shaped closure for one end of said receptacle movable lengthwise thereof and a movable plunger adapted to closely -it said closure and arranged to'move it to expel the contents of the receptacle.

p 4. A syringe comprisin a barrel, a receptacle for containing a pre etermined amount of fluid removably secured in said barrel, a projection provided with a passage and arranged to puncture the bottom of said receptacle and establish communication with the discharge end, a cup-shaped closure for j closin the one end of said receptacle and slidab e llengthwise thereof, and a plunger movable in said barrel and'adapted to fit in `said cup-shaped closure to move it lengthwise of the receptacle for discharging the contents thereof.

5. A syringe comprising a a dischar e end, a receptacle made of easily puncture material, in said barrel for containing a predetermined amount of fluid, permanently fixed means in said barrel for puncturing said receptacle and establishin communication with the discharge end and means for expelling the contents of the receptacle. y

6. A syringle comprising a barrel havin a curved disc arge end,\a permanently fixe projection having a passage therethrough and located in said lbarrel adjacent to said discharge end, a receptacle of soft material for a predetermined amount of iiuid arranged to be forced over said projection and to be punctured thereby and a plunger having a curved end for compressing said receptacle and expelling the contents thereof.

7. A cartridge for syringes'com rising a tubular receptacle having a close and an open end and adapted to contain a predetermined amount of fluid and to be inserted in the barrel of, a syringe and a separate closure adapted to seal the open end of said cartridge and slidable lengthwise thereof to eject the fluid.

8. A cartridge comprising a tubular receptacle having a closed and an open end and ada ted to contain a predetermined amount of uid and to be inserted in the barrel of the syringe and a separate cup-shaped closure for sealin the open end of said cartridge and slidable lengthwise thereof to eject the fluid.`

In Vtestimony whereof I have hereunto set my hand in the presenceof two subscrlblng witnesses.

Witnesses:

JOHN A. KEHLENBECK. G. V. RAsMUssEN.

barrel having ALFRED Bonson. 

